b-u bbb bbf bbi bbm bbn bbr bbu bfb bff bfi bfm bfn bfr bfu bi- bib bif bii bim bin bir biu bmb bmf bmi bmm bmn bmr bmu bnb bnf bni bnn bnr bnu brb brf bri brm brn brr bru bub buf bui bum bun bur buu fbb fbf fbi fbm fbn fbr fbu fff ffi ffm ffn ffr ffu fib fif fii fim fin fir fiu fmb fmf fmi fmm fmn fmr fmu fnb fnf fni fnm fnn fnr fnu frb frf fri frm frn frr fru fub fuf fui fum fun fur fuu i-f ibb ibf ibi ibm ibn ibr ibu ifb iff ifi ifm ifn ifr ifu iib iif iii iim iin iir iiu im- imb imf imi imm imn imu in- inb inf ini inm inn inr inu ir- irb irf iri irm irn irr iru iu- iub iui ium iur m-f m-r mbb mbf mbi mbm mbr mbu mfb mff mfi mfm mfn mfr mfu mi- mib mif mii mim min mir miu mmb mmf mmi mmm mmn mmr mmu mnb mnf mni mnm mnn mnr mnu mrb mrf mri mrm mrn mrr mru mub muf mui mum mun mur muu n-i nbb nbf nbi nbm nbn nbr nbu nfb nff nfi nfn nfr nfu nib nif nii nim nin nir niu nmb nmi nmm nmn nmr nmu nnb nnf nni nnm nnn nnu nrb nrf nri nrm nrn nrr nru nub nui num nun nur nuu rbb rbf rbi rbm rbn rbr rbu rfb rff rfi rfm rfn rfr rfu rib rif rii rim rin rir rmb rmf rmi rmm rmn rmr rnb rni rnm rnn rnr rnu rrb rrf rri rrm rrn rrr rru rub ruf rui rum run rur ruu ubb ubf ubi ubn ubr ubu uff ufi ufm ufn ufr ufu uib uif uii uim uin uir uiu um- umb umf umi umm umn umr umu un- unb unf uni unm unn unr unu ur- urb urf uri urm urn urr uru uum uun uur uuu